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# copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of astroid.
#
# astroid is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 2.1 of the License, or (at your
# option) any later version.
#
# astroid is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
# for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with astroid. If not, see <http://www.gnu.org/licenses/>.
"""this module contains exceptions used in the astroid library
"""
__doctype__ = "restructuredtext en"
class AstroidError(Exception):
"""base exception class for all astroid related exceptions"""
class AstroidBuildingException(AstroidError):
"""exception class when we are unable to build an astroid representation"""
class ResolveError(AstroidError):
"""base class of astroid resolution/inference error"""
class MroError(ResolveError):
"""Error raised when there is a problem with method resolution of a class."""
class DuplicateBasesError(MroError):
"""Error raised when there are duplicate bases in the same class bases."""
class InconsistentMroError(MroError):
"""Error raised when a class's MRO is inconsistent."""
class SuperError(ResolveError):
"""Error raised when there is a problem with a super call."""
class SuperArgumentTypeError(SuperError):
"""Error raised when the super arguments are invalid."""
class NotFoundError(ResolveError):
"""raised when we are unable to resolve a name"""
class InferenceError(ResolveError):
"""raised when we are unable to infer a node"""
class UseInferenceDefault(Exception):
"""exception to be raised in custom inference function to indicate that it
should go back to the default behaviour
"""
class UnresolvableName(InferenceError):
"""raised when we are unable to resolve a name"""
class NoDefault(AstroidError):
"""raised by function's `default_value` method when an argument has
no default value
"""
class OperationError(object):
"""Object which describes a TypeError occurred somewhere in the inference chain
This is not an exception, but a container object which holds the types and
the error which occurred.
"""
class UnaryOperationError(OperationError):
"""Object which describes operational failures on UnaryOps."""
def __init__(self, operand, op, error):
self.operand = operand
self.op = op
self.error = error
def __str__(self):
operand_type = self.operand.name
msg = "bad operand type for unary {}: {}"
return msg.format(self.op, operand_type)
class BinaryOperationError(OperationError):
"""Object which describes type errors for BinOps."""
def __init__(self, left_type, op, right_type):
self.left_type = left_type
self.right_type = right_type
self.op = op
def __str__(self):
msg = "unsupported operand type(s) for {}: {!r} and {!r}"
return msg.format(self.op, self.left_type.name, self.right_type.name)
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